Serie A is Italy's top football league. Twenty clubs play 38 matches each from August to May, and the bottom three are relegated to Serie B.
Italian football has a long tradition of strong defending and tactical games, so tight scores are common and the draw is a real outcome in many matches.
Yes - the 90 minutes include the time added on at the end of each half. Extra time and penalties, in the few games that have them, are not counted in the match result.
Three, replaced by three clubs from Serie B.
More leagues: LaLiga, Premier League, Bundesliga.